package cn.ycl.system.other.study.designMode.combination;

/**
 * @author YuanChangLiang
 * @description
 * @date created in 10:34 2021/7/22
 */


public abstract class Observer {
    /**
     * 具体被观察则通过此方法通知具体观察者
     */
    public abstract void update();
}
